Drainage device



FIG. 1 is a front elevational view of the drainage device of the presentinvention, the rear view being a mirror image thereof;

FIG. 2 is a right side elevational view of the drainage device of FIG.1;

FIG. 3 is a left side elevational view of the drainage device of FIG. 1;

FIG. 4 is a top plan view of the drainage device of FIG. 1; and,

FIG. 5 is a bottom plan view of the drainage device of FIG. 1.

The ornamental design for a drainage device, as shown and described.